using System;
using System.Text;
using System.Data;
using System.Collections;
using System.Collections.Generic;

using Framework;

namespace SchemaDeploy
{
    //Table-Row Class (Customisable half)
    public partial class CReportHistory
    {
        #region Constants
        //Join Expressions        
        private static string JOIN_BINARYFILE = string.Concat(TABLE_NAME, " INNER JOIN ", CBinaryFile.TABLE_NAME, " ON ReportInitialSchemaMD5=MD5"); //Nullable => Use LEFT OUTER JOIN
		private static string JOIN_INSTANCE = string.Concat(TABLE_NAME, " INNER JOIN ", CInstance.TABLE_NAME, " ON ReportInstanceId=InstanceId"); //Nullable => Use LEFT OUTER JOIN
		private static string View(int appId) { return appId == int.MinValue ? TABLE_NAME : JOIN_INSTANCE; }
		#endregion

		#region Constructors (Public)
		//Default Connection String
		public CReportHistory() : base() {}
        public CReportHistory(int reportId) : base(reportId) {}
        
        //Alternative Connection String
        public CReportHistory(CDataSrc dataSrc) : base(dataSrc) {}
        
        public CReportHistory(CDataSrc dataSrc, int reportId) : base(dataSrc, reportId) {}
        
        //Transactional (shares an open connection)
        protected internal CReportHistory(CDataSrc dataSrc, int reportId, IDbTransaction txOrNull) : base(dataSrc, reportId, txOrNull) {}        
        #endregion

        #region Default Values
        protected override void InitValues_Custom()
        {
            _reportAppStarted = DateTime.Now;
        }
        #endregion
        
        #region Default Connection String
        protected override CDataSrc DefaultDataSrc()  { return CDataSrc.Default;  }
        #endregion

        #region Members
        //Foreign Keys
        [NonSerialized()]   private CBinaryFile _binaryFile;

        //Child Collections  

        //Xml Data (as high-level objects)

        #endregion

        #region Properties - Relationships
        //Relationships - Foriegn Keys (e.g parent)
        public CInstance Instance { get { return CInstance.Cache.GetById(this.ReportInstanceId); } }
        public CVersion InitialVersion { get { return CVersion.Cache.GetById(this.ReportInitialVersionId); } }

        public CBinaryFile BinaryFile
        {
            get
            {
                if (_binaryFile == null)
                {
                    lock (this)
                    {
                        if (_binaryFile == null)
                            _binaryFile = new CBinaryFile(this.ReportInitialSchemaMD5);
                    }
                }
                return _binaryFile;
            }
            set
            {
                _binaryFile = value;
                _reportInitialSchemaMD5 = null != value ? value.MD5 : Guid.Empty;
            }
        }

        //Relationships - Collections (e.g. children)

        #endregion

        #region Properties - Customisation
        //Derived/ReadOnly (e.g. xml classes, presentation logic)
        public TimeSpan RanFor { get { return DateTime.MinValue == ReportAppStopped ? DateTime.Now.Subtract(ReportAppStarted) : ReportAppStopped.Subtract(ReportAppStarted);  } }
        public string RanFor_ { get { return CUtilities.Timespan(RanFor); } }
        public string ReportInitialSchemaB64 { get { return CBinary.ToBase64(ReportInitialSchemaMD5, 6); } }
        #endregion

        #region Save/Delete Overrides
        //Can Override base.Save/Delete (e.g. Cascade deletes, or insert related records)
        #endregion

        #region Custom Database Queries
        //For Stored Procs can use: MakeList (matching schema), or DataSrc.ExecuteDataset (reports etc)
        //For Dynamic sql, can use: SelectSum, SelectDistinct, SelectCount, SelectWhere (inherited methods)
        //                see also: SelectBy[FK], Search and Count (auto-generated sample queries)
        public CReportHistoryList SelectByMD5s(List<Guid> mD5s) { return SelectWhere(new CCriteriaList("ReportInitialSchemaMD5", ESign.IN, mD5s)); }

		public int SelectCountByAppId(int appId) { return SelectCount(new CCriteriaList("InstanceAppId", appId), JOIN_INSTANCE); }
		#endregion

		#region Searching (Optional)
		//Dynamic search methods: (overload as required for common search patterns, cascade the BuildWhere overloads)
		//   Public  x5 - Simple, Paged, Transactional, Count, and Dataset
		//   Private x1 - BuildWhere
		//See also in-memory search options in list class, such as GetBy[FK] and Search

		//Simple
		public CReportHistoryList SelectSearch(string nameOrId , int appId, int instanceId, int initialVersionId = int.MinValue)  {   return SelectWhere(BuildWhere(nameOrId , appId, instanceId, initialVersionId), View(appId)); }

		//Paged
		public CReportHistoryList SelectSearch(CPagingInfo pi, string nameOrId , int appId, int instanceId, int initialVersionId = int.MinValue)
        {
			pi.TableName = View(appId);
			return SelectWhere(pi, BuildWhere(nameOrId , appId, instanceId, initialVersionId));
        }

        //Transactional
        public CReportHistoryList SelectSearch(string nameOrId, int appId, int instanceId, int initialVersionId,  IDbTransaction tx)   {   return SelectWhere(BuildWhere(nameOrId, appId, instanceId, initialVersionId), View(appId), tx); }

        //Dataset (e.g. ExportToCsv)
        public DataSet SelectSearch_Dataset(string nameOrId, int appId, int instanceId, int initialVersionId = int.MinValue)   {   return SelectWhere_Dataset(BuildWhere(nameOrId, appId, instanceId, initialVersionId), View(appId)); }
        //Count
        public int SelectCount(string nameOrId, int appId, int instanceId, int initialVersionId = int.MinValue)   {   return SelectCount(BuildWhere(nameOrId  , appId, instanceId, initialVersionId), View(appId)); }

        //Filter Logic
        private CCriteriaList BuildWhere(string nameOrId, int appId, int instanceId, int initialVersionId)
        {
            CCriteriaList where = new CCriteriaList();  //Defaults to AND logic
            
            //Simple search box UI
            if (!string.IsNullOrEmpty(nameOrId)) 
            {
                //Interpret search string in various ways using OR sub-expression
                CCriteriaGroup orExpr = new CCriteriaGroup(EBoolOperator.Or);
                
                //Special case - search by PK
                /* 
                int id = 0;
                if (int.TryParse(nameOrId, out id))
                    orExpr.Add("ReportId", id); 
                */
                
                //Search a range of string columns
                string wildCards = string.Concat("%", nameOrId, "%");

                //Conclude
                if (orExpr.Group.Count > 0)
                    where.Add(orExpr);
            }

			//Other search Colums (customise as required)
			if (int.MinValue != instanceId)
				where.Add("ReportInstanceId", instanceId);
			else if (int.MinValue != appId)
				where.Add("InstanceAppId", appId);

            if (int.MinValue != initialVersionId)
				where.Add("ReportInitialVersionId", initialVersionId);

            return where;
        }
        #endregion


        #region Cloning
        public CReportHistory Clone(CDataSrc target, IDbTransaction txOrNull) //, int parentId)
        {
            //Shallow copy: Copies the immediate record, excluding autogenerated Pks
            CReportHistory copy = new CReportHistory(this, target);

            //Deep Copy - Child Entities: Cloned children must reference their cloned parent
            //copy.SampleParentId = parentId;

            copy.Save(txOrNull);

            //Deep Copy - Parent Entities: Cloned parents also clone their child collections
            //this.Children.Clone(target, txOrNull, copy.ReportId);

            return copy;
        }
        #endregion

        #region ToXml
        protected override void ToXml_Custom(System.Xml.XmlWriter w)
        {
            //Store(w, "Example", this..Example)
        }
        #endregion
    }
}